Display screen or portion thereof with an animated graphical user interface



FIG. 1 is a front view of a first image in a sequence of a firstembodiment for a display screen or portion thereof with an animatedgraphical user interface showing the new design;

FIG. 2 is a front view of a second image thereof;

FIG. 3 is a front view of a first image in a sequence of a secondembodiment for a display screen or portion thereof with an animatedgraphical user interface showing the new design;

FIG. 4 is a front view of a second image thereof;

FIG. 5 is a front view of a first image in a sequence of a thirdembodiment for a display screen or portion thereof with an animatedgraphical user interface showing the new design; and,

FIG. 6 is a front view of a second image thereof.

The outermost broken line rectangle illustrates a display screen orportion thereof and forms no part of the claimed design. The remainingbroken lines illustrate portions of the animated graphical userinterface that form no part of the claimed design.

The appearance of the transitional image sequentially transitionsbetween the images shown in FIGS. 1-2 , FIGS. 3-4 , or FIGS. 5-6 . Theprocess or period in which one image transitions to another forms nopart of the claimed design.

CLAIM I claim the ornamental design for a display screen or portion thereof with an animated graphical user interface, as shown and described. 